Browsing Institutt for elkraftteknikk by Title
Now showing items 1012-1031 of 2415
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High Gain DC-AC High-Frequency Link Inverter with Improved Quasi-Resonant Modulation
(Peer reviewed; Journal article, 2021)This paper presents a high gain pure sine-wave inverter based on the full-bridge DC-AC high-frequency (HF) link cycloconverter topology for telecom or general-purpose applications. The improved quasi-resonant modulation ... -
High precision scalable power converter for accelerator magnets
(Peer reviewed; Journal article, 2022)The lower conduction power losses and the positive temperature coefficient that favours parallel connections, make Silicon Carbide (SiC) metal oxide semiconductor field-effect transistors (MOSFETs) to be an excellent ... -
High voltage insulation design of coreless, planar PCB transformers for multi-MHz power supplies
(Peer reviewed; Journal article, 2021)This paper investigates the insulation design for printed, planar, coreless, and high-frequency transformers with high isolation-voltage. By using finite element analysis on 2D axial-symmetry, the transformer circuit ... -
High Voltage Subsea Connectors for Offshore Wind – Study of Interfaces
(Master thesis, 2023)Europakommisjonen har satt som mål å nå 450 GW med offshore vindparker innen 2050, og med det bli det første karbonnøytrale kontinentet. Det er nødvendig å utvikle teknologi for å redusere kostnaden av flytende vindparker ... -
High voltage wound-rotor induction machines - harmonic field effects and power quality issues
(Master thesis, 2015)The last few decades, harmonic content in the power system has increased dramatically, due to more complex power systems containing more power electronics and other nonlinear loads. The background for this work is a severe ... -
High-Power Electric Charging in the Norwegian Distribution Grid
(Master thesis, 2020)Norge har satt seg et mål om å redusere klimagassutslippene med 40% innen 2030. En betydelig bidragsyter for å nå dette målet er overgangen til elektrisk transport. Hensikten med denne oppgaven var å undersøke hvordan et ... -
High-Power Machines and Starter-Generator Topologies for More Electric Aircraft: A Technology Outlook
(Peer reviewed; Journal article, 2020)More electric aircraft (MEA) architectures consist of several subsystems, which must all comply with the settled safety requirements of aerospace applications. Thus, achieving reliability and fault-tolerance represents the ... -
High-Q whispering gallery mode germanium microresonators at 8 μm
(Journal article; Peer reviewed, 2022) -
High-Speed MW-Class Generator with Multi-Lane Slotless Winding for Hybrid-Electric Aircraft
(Peer reviewed; Journal article, 2023)This paper presents a comprehensive design and analysis of a high-speed, multi-lane, 2.5MW, 15 000 rpm, 3 kV slotless generator system tailored for hybrid-electric aircraft. The armature of this generator incorporates ... -
High-voltage and high-frequency design of planar transformer with minimum coupling capacitance
(Chapter, 2019)This paper investigates the design of a planar transformer operating at 6.78 MHz and with a target maximum isolation voltage of 40 kV using 2D FEM simulations as a tool. In addition, minimal coupling capacitance must be ... -
High-Voltage Circuit Breaker Condition-Dependent Failure Rate with Covariates
(Peer reviewed; Journal article, 2024)High-voltage circuit breakers (HVCBs) are essential protection devices which should also be included in power system reliability analysis. When using Monte-Carlo simulation methods the reliability of individual components ... -
High-Voltage Multilevel Converters: Application of Multilevel Converters in Direct Grid Connection of Wind Turbines
(Master thesis, 2010)In this thesis a modular PMSG and converter topology, suitable for utility interface of large wind turbine has been has been explored. A comprehensive analysis on different sinusoidal pulse width modulation has been performed ... -
HTS Winding Design and 3D FEA Modeling of Superconducting Machine for Aviation
(Master thesis, 2023)I denne avhandlingen presenteres metoder og formuleringer for modellering av roterende elektriske maskiner. 3D-modeller av en superledende maskin for luftfart utvikles ved hjelp av den kommersielle FEA-programvaren Comsol ... -
Hurtiglading av elbil - Energilagring
(Master thesis, 2014)Oppgaven tar for seg en problemstilling knyttet til hurtigladestasjoner for elbiler og problemer dette kan gi for overføringsnettet. I nett hvor tilkobling av slike ladestasjoner er problematisk kan lokal lagring brukes ... -
HVDC Circuit Breakers: A Comprehensive Review
(Peer reviewed; Journal article, 2021)High Voltage Direct Current (HVDC) systems are now well-integrated into AC systems in many jurisdictions. The integration of Renewable Energy Sources (RESs) is a major focus and the role of HVDC systems is expanding. ... -
HVDC meshed multi-terminal networks for offshore wind farms: Dynamic model, load flow and equilibrium
(Chapter, 2017)This paper presents sufficient conditions for the existence of an equilibrium point of multi-terminal HVDC (MT-HVDC) network for offshore applications. Newton's method is used both as a computational tool and as the basis ... -
HVDC Transmission Using a Bipolar Configuration Composed of an LCC and MMC: Operating Characteristics of Skagerrak 3 and Skagerrak 4
(Master thesis, 2014)The operational properties of a bipolar configuration composed of a Line-Commutated Converter (LCC) and a Voltage Source Converter (VSC) in a multilevel topology (MMC) are investigated. Simulation models are made in the ... -
Hvordan kan vi utnytte dagens solcelleteknologi for å skape den beste økonomiske løsningen for et kjøle- og fryselager?
(Bachelor thesis, 2021)Denne bachelorrapporten undersøker om det er mulig å utnytte dagens solcelleteknologi for å skape en økonomisk gunstig løsning for et kjøle- og fryselager. Tilgangen på timesoppløst forbruksdata har gjort det mulig å ... -
Hvordan vil endringer i forbruksmønsteret påvirke fremtidige nettinvesteringer
(Bachelor thesis, 2020)I dette prosjektet blir AMS data analysert for å danne et bilde av strømnettets forløp over 2019, for 8 nettstasjoner i et lokalt nett. Det blir analysert reelt effektuttak og samtidighetsfaktorer, samt sannsynlige ...